/* create only, no updates */
if (fipPoolModel == null) {
fipPoolModel = new FloatingIpPoolModel();
fipPoolModel.addToVirtualNetwork(vnModel);
fipPoolModel.build(getModelController());
try {
fipPoolModel.update(getModelController());
vnModel.setFipPoolModel(fipPoolModel);
} catch (Exception ex) {
s_logger.warn("floating-ip-pool create: ", ex);